Mega pixel , lens, WDR and night vision features of cctv camera

Megapixels refer to a CCTV camera's sensor resolution, determining image clarity; higher values like 8MP yield sharper details for identification.
Lens types include fixed (e.g., 2.8mm for wide views) or varifocal (adjustable zoom), affecting field of view and focus.
WDR (Wide Dynamic Range) balances high-contrast scenes, preventing over/underexposure in bright/dark areas.
Night vision enables low-light imaging via IR LEDs (black/white) or color tech for 24/7 visibility.
Examples:

Hikvision: 8MP DarkFighter cameras with varifocal lenses, 120dB WDR, and IR night vision up to 50m.
Dahua: 8MP Starlight models with 2.8mm fixed lens, Ultra WDR (140dB), and full-color night vision.
Axis: Lightfinder cams with 4K (8MP equiv.) resolution, motorized varifocal lenses, Forensic WDR, and optimized low-light color capture.
Bosch: Starlight series with 2MP-8MP sensors, integrated IR, 120dB WDR for dynamic scenes.
Refer- https://kysinfotech.in/forums/topic/mega-pixel-lens-wdr-and-night-vision-features-of-cctv-camera/